A. P. Vladimirov, Drukarenko N.A, K. E. Myznov, “Using speckle images for determining the local plastic strains arising at high-cycle fatigue of 09G2S steel”, Pisma v Zhurnal Tekhnicheskoi Fiziki, 2021, Volume 47, Issue 15,Pages <nobr>35

This article is cited in 3 papers

Using speckle images for determining the local plastic strains arising at high-cycle fatigue of 09G2S steel

A. P. Vladimirov^ab, Drukarenko N.A^a, K. E. Myznov^b

^a Institute of Engineering Science, Urals Branch, Russian Academy of Sciences, Ekaterinburg
^b Ural Federal University named after the First President of Russia B. N. Yeltsin, Ekaterinburg

Abstract: Plastic strains arising in the zone of fatigue crack initiation are estimated with the aid of time-averaged speckle images on a sample of 09G2S steel with two grooves 2.5 mm in radius. It is shown that the fatigue fracture appears owing to localization of irreversible processes in the region less than 1 mm and the limit value of tension plastic strains is on the order of 10$^{-1}$. As an indication of fracture, it is proposed to use the fact that the normed temporal autocorrelation function of radiation intensity reduces to a negative value.

Keywords: speckles, image, high-cycle fatigue, deformation, fracture.

Received: 04.03.2021
Revised: 16.04.2021
Accepted: 04.05.2021

DOI: 10.21883/PJTF.2021.15.51232.18752